White spot, moving in one direction and at a slow pace. No defining shape, just a spot.

Whilst driving, in my coastal home town around the coastal loop I noticed an object in the sky. It was a very clear sunny day, no clouds and the oject was no where near the usual flight path of passenger aircraft. It was like a white spot in the sky moving northward and at a slow to steady pace. I stopped and got out of my car only to lose sight of it. About two weeks later upon dusk, again I saw a similar object but this time it seemed much lower, white and moved over my house. It moved about the same pace as in the first sighting of this object. As I scrambled the kids to look at it, by this stage it was gone. There was no noise to be heard during both sightings.